145371249 has 9 divisors (see below), whose sum is σ = 210032953. Its totient is φ = 96890052.

The previous prime is 145371217. The next prime is 145371253. The reversal of 145371249 is 942173541.

The square root of 145371249 is 12057.

It is a perfect power (a square), and thus also a powerful number.

145371249 is a `hidden beast` number, since 1 + 45 + 371 + 249 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 145371249 - 2⁵ = 145371217 is a prime.

It is a super-2 number, since 2×145371249² = 42265600071640002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145371049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 34162 + ... + 38180.

Almost surely, 2^145371249 is an apocalyptic number.

145371249 is the 12057-th square number.

145371249 is the 6029-th centered octagonal number.

It is an amenable number.

145371249 is a deficient number, since it is larger than the sum of its proper divisors (64661704).

145371249 is an frugal number, since it uses more digits than its factorization.

145371249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044 (or 4022 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The cubic root of 145371249 is about 525.8067704805.

Multiplying 145371249 by its sum of digits (36), we get a square (5233364964 = 72342²).

The spelling of 145371249 in words is "one hundred forty-five million, three hundred seventy-one thousand, two hundred forty-nine".